Circuit for producing a reset signal

摘要

A circuit for producing a reset signal includes a voltage divider at which a first voltage proportional to a supply voltage can be tapped off. A resistor and a Zener diode disposed in the reverse direction are connected between the supply voltage and ground in a series circuit at which a second voltage can be tapped off. A difference signal between the first and second voltages is supplied to a first bistable multivibrator. An output signal from the first multivibrator is supplied to a low-pass filter configuration. A difference signal between an output signal from the low-pass filter configuration and the second voltage is supplied to a second bistable multivibrator. The multivibrators each exhibit hysteresis. A reset signal can be tapped off at the second multivibrator.